Modeling of Coupling Mechanism between Ballast Bed and Track Structure of High-Speed Railway

Table 1

Physical parameters of the ballast and sleeper.

Physical parameters	Ballast	Type III concrete sleeper
Density (kg·m^−3)	2700	2000
Poisson’s ratio	0.25	0.25
Shear modulus (Pa)	1.0 × 1010	1.44 × 1010